After an O.J. Mayo three-point play clawed the Bucks within 100-97 with 2:38 left, Datome nailed a left wing 3-pointer and put in a layup to extend Boston's advantage to 105-97.

The Celtics were never threatened again.

Mayo was off on a 3 and Patrick O'Bryant missed a short jumper before a Mayo triple with 18.5 ticks remaining was too late.

Earlier, Milwaukee led 25-22 following a quarter of play, but the Celtics outscored the Bucks 27-20 in the second and were up 49-45 at the break.

Boston took a 73-72 edge into the fourth.

"For the most part I thought we played pretty well," Celtics coach Brad Stevens said.

Game Notes

Boston had dropped three of its previous four meetings against the Bucks in Milwaukee ... The Bucks went a franchise-worst 15-67 last season ... The Celtics shot 49.4 percent (42-of-85) and connected on 13-of-30 from 3-point range.